Cylinder lock



Patented Aue. 20, 1929.

U N ITED STATES PATENT FFCE.

SAMUEL SEGALOF NEW YORK, vN. Y., A'SSIGNOR TO SEGAL LUCK c HARDWARE C0., INC., F NEW YORK, N. 4Y., A CORPORATON OF NEW YGRK.

CYLINDER LOCK.

Application filed-March 18, 1927. Serial No. 176,336.

This invention .relates to improvements. in locks.

Itis an object'of fthe invention `to provide a cylinder assemblage of improved construction and by means of which a lock may be readily installed to operate perfectly, and in which wear may be readily compensated tor without necessity oi" renewing 'the cylinder.

It is a further object to provide a tailpiece of improved construction and serving to connect the cylinder yplug with the crank of a. lock mechanism, this element cooperating advantageously with an improved plug assemblage constructed within the teachings oii the present invention.

A further object resides in the designing of a cylinder and mechanism accessory thereto, which may be constructed at a relatively nominal ligure and readily assembled, to be used over relatively long periods of time, tree from mechanical diiiiculties, thus providing a commercial construction.

lilith these and further objects in mind, the invention vaccordingly comprises the features of construction, combination of elements and arrangement oi" parts which will be exen'iplilied in the construction hereinafter set forth, and the scope ot' the application of which will be indicated in the claims.

vFor a fuller .understanding` of the nature and objects of the invention reference should be had to' the following detailed description taken in connection with the accompanying dra-wings, in which: h

Figure 1 is a fragmentary sectional view of the rear zend ot' a cylinder assemblage; and

Fig. Q is van elevation of a tail-piece; the illustrations showing one form of construction embodying the present invention.

. In these views the numeral l5 indicates a lock cylinder, within the base of which a plug is rotatably mounted, the cylinder having integral abutments 7 formed with screwthreaded openings 8 through which the bolts ot the cover-plate extend.

It is here to be noted that in order to reduce the amount of non-essential showing illust-ration oi the several pins, tumblers, springs and key-slot structures has been eliminated, these constructions being of any desired type.

However, it will be observed, reference .being had to Fig. l, thatthe plug is continued beyond the rear tace of the cylinder,

has been indicated at 9, and that the keyslot is likewise continued as at 10. The el;- terior face et' this extendedportion of the plug is screw-threaded and a flanged nut 1l engages this screw thread and bears against the rear face of "the cylinder in order to prevent longitud-inal play ot the plug with respect thereto.

By the construction herewith illustrated or its equivalent, the cost of inishing and assembling is reduced materially, aside from the fact that as wear takes place resulting in longitudinal .play of the Aplug with consequent danger of a refusal ot operation of the lock, it is practicable, by simply rotating the nut with respect to the plug, to tighten the latter within the cylinder. ln thisconncction it will be appreciated that in accordance with conventional construction,A the outer end of the plug present-ing the entry to the key slot may be headed and seat within an enlarged recess at the outer end oi', and concentric with, the plug bore. of the cylinder, so that inward movement o1 the plug with respect tothe latter' is at all times prevented.

Again with reference to Fig. 1, the flange of the nut 11 is formed with an annular series of notches 12, and the extended portion -9 oi the plug is Jormed with a transverse bore 13 extended t'romtlie outer face oi' such extended portion, intersecting the enlarged rear portion 14 ofthe hey-slot and terminating 'in a. point short ot fthe opposite tace of the plug. The central axis ot this bore may lie inA a plane beyond the outer edge of' the iianged `portion or" thev nut, but in any event, the innermost portions of such bore preferably extend into a plane beyond th atdeiined by the base portions ot the notches 12. A pin .is slidably mounted within this bore and includes a body 15 having an enlarged head 16 at a point slightly to the rear of its outer end (thus providing a reduced end portion), and further includes an enlarged base portion 17, which is bored as at 18 and within which a spring 19 is positioned. This spring has one of its ends bearing aga-inst the inner end of the "bore 18, its oppo- 105 `site'end bearing against Vthe inner end of -the bore 13, so 'that lthe pin is constantly urged outwardly. The `reduced end portion of the pin is of a size adequately small to enter selectively in one of the series ot '110 notches l2. *AS a consequence, the nut may be tightened to a point at which the plug, although freely turnable, rests in proper position with respect to the cylinder, and thereupon the pin, which has been previously retained against projection in any desirable manner, is released and will move to the position shown in Fig. l, locking the nut against further movement with respect tothe plug. In this connection it Will be observed that incident to the enlarged head portion a projection of the pin beyond proper limits will be prevented, in that this head portion will bear against the inner face of the nut flange. Furthermore, in order to prevent a detachment of the pin from'the plug eXtension when no nut encircles the plug end, it Will be observed that the plug end is preferably indented to provide a projection 2O eX- ten'dine into the bore 13. This projection Will cooperate with the enlarged pin base 17 and prevent the spring from forcing the pin to a position Wholly Without the plug.

The pin, in addition to serving to anchor the nut, also secures the tail-piece to the plug. This element, as in Fig. 2, preferably includes a body 2l formed of a strip of metal and having a series of transverse indentations 22 along which lines its body may be severed. Each end of this element conveniently has a key-hole slot 23, the shank portion of Which is of a Width slightly in eX- cess of the diameter of the body portion l5, and the enlarged portion of which is of a size slightly in excess of the diameter ofthe enlarged base portion 17 of the pin. Due to the fact that the enlarged rear portion 14 of the key-slot l0 is only slightly Wider than the strip' 2l, the latter, although free to move Within certain limits, cannot move along the pin to a point at which, When the latter is projected, the tail-piece may be detached from the plug. However, if the pin is pressed invvardly against the compression of the spring 19 and until the body l5 of the pin extends across the enlarged slot portion 14, it is obvious that the tail-piece may be detached readily. In this connection it will be observed that this element may be employed advantageously with the parts in such position t-o retain the pin against projection while the nut is being moved into position on the plug or removed therefrom. Furthermore, in the event that a loclrsmith finds as is often the case) that the body of the tailp`iece has been broken along a score-line too close to the plug, so that connection With the lock mechanism cannot be established, he may, simply by detaching the tail-piece from the plug and applying thereto the portion of that element which has been severed, have available a longer extension to establish connection between the cylinder and the crank of the lock mechanism.

Thus, among others, the several objects of this invention have been achieved, and since certain changes may be made in the above construction, and different embodiments of the invention could be made, Without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the following claims are intended to cover all of the generic and specific features of the invention herein described and all statements of the scope of the invention Which as a matter of language might be said to fall therebetween.

Having described my invention, what I claim as new and desire to secure by Letters Patent is:

l. A lock, including, in combination, a bored cylinder, a plug Within the bore thereof and rotatable with respect thereto, means for retaining said plug in seated position Within said bore, and a pin preventing movement of said last-named means, said pin having a recess in its rear face, and a spring seated Within said recess and bearing against said plug to force said pin into Contact with said plug-retaining means.

2. A lock, including, in combination, a boredcylinder, a plug Within the bore thereof and rotatable With respect thereto, means for retaining said plug in seated position Wit-hin said bore, a pin cooperating with said plug-retaining means normally to prevent movement thereof with respect to said plug, and means forming a part of said plug for retaining said pin against detachment therefrom.

3. A lock, including, in combination, a bored cylinder, a plug Within the bore thereof and rotatable With respect thereto, means for retaining said plug in seated position ivithin said bore,a pin cooperating with said plug-retaining means normally to prevent movement thereof with respect to said plug, and an inwardly-projecting portion forming a part of said plug and cooperating With said pin to prevent the detachment of the latter from the body of the former.

4:. A lock, including, in combination, a bored cylinder, a plug rotatably positioned within the cylinder bore andextending beyond the same, Va nut encircling said plug and bearing against said cylinder to retain the fermer seated Within the latter, said plug being formed With a transverse bore, a pin positioned Within said bore and engaging said nut to prevent movement thereof with respect to sald plug, the base of said pin being formed with a recess, and a spring seatedvvithin said recess and bearing against the plug Wall to force the pin into engagement with said nut.

5. A lock, including, in combination, a

bored cylinder, a plug within the bore of and rotatable with respect to said cylinder, a pin associated with said plug anid movable with respect thereto, said pin having a reduced portion, and a tail-piece having a keyhole notch at its end, said pin being shiftable to align the reduced portion thereof with the reduced portion of said notch, whereby the tail-piece may be associated with said pin and plug.

6. A lock, including, in combination, a bored cylinder, a plug within the bore of and rotatable with respect to said cylinder, a pin associated with said plug and movable with respect thereto, said pin having a. reduced portion, and a tail-piece having a keyhole notch at its end, the plug being formed with a slot across which said pin extends, the body of said pin being shiftable to bring the reduced portion thereof into alignment with said slot, and the tail-piece being insertable into said slot to bring the notch portion thereof thereinto, said pin being shiftable to have its enlarged portion enter the enlarged portion of said notch to prevent detachment of said tail-piece from said plug.

7. A lock, including, in combination, a bored cylinder, a plug within the bore of and rotatable with respect to said cylinder, a pin associated with said plug and movable with respect thereto, said pin having a reduced portion, a tail-piece having a keyhole notch at its end, the plug being formed with a slot across which said pin extends, the body of said pin being shiftable to bring the reduced portion thereof into alignment with said slot, and the tail-piece being insertable into said slot to bring the notch portion thereof thereinto, and a spring bearing against said pin normally to bring the enlarged portion thereof to extend across said slot, such enlarged portion entering the enlarged portion of the notch to prevent detachment of the tail-piece.

8.. As an article of manufacture, a tailpiece for a lock, including a strip of material foimed with keyhole notches in its opposite en s.-

9. As an article of manufacture, a tailpiece for a lock, including a strip of material formed with keyhole notches in its opposite ends, the reduced portions of said notches extending toward the end edges of said strip.

10. A lock, including in combination a plug, a tail-piece and quick releasable means movable With respect to both of said elements, and mounted by one of the same, for opera-tively coupling such elements one to the other and retaining the same against detachment.

l1. A lock, including in combination a plug, a tail-piece and quick releasable means movable with respect to both of said elements, and mounted by one of the same, for operatively coupling such elements one to the other and retaining the same against detachment, and means for normally maintaining such means in non-releasing position.

l2. As an article of manufacture a tailpiece for a lock including a body and means forming a part of said body and provided adjacent each end of the same whereby either end of said piece may be directly coupled to a cylinder plug.

'13. As any article of manufacture a tailpiece for locks including a body comprising a strip of material formed with an opening at each end whereby either end of said piece may be directly coupled to the plug of a cylinder.

14. A lock including in combination a cyl inder plug, means for coupling a tail-piece thereto and a tail-piece including a strip of material and means provided at both ends of said piece whereby either of the ends thereof may be associated with said coupling means.

In testimony whereof I afiix my signature.

SAMUEL SEGAL. 

